09 High

Vokera 09 Fault Code

The Vokera 09 fault code means: your boiler has stopped working because it has detected a problem with the gas supply or the internal valve that controls the fuel flow.. It appears on 12 Vokera models in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: Gas valve circuit / low pressure error

What causes the Vokera 09 fault?

This fault occurs when the boiler's control system loses its electrical connection with the gas valve or detects that the valve isn't opening correctly. The most common reason is a hardware failure within the valve itself, though it can also be caused by a faulty control board sending the wrong signals. Essentially, the boiler has shut down because it can no longer safely manage the flow of fuel needed to create a flame.

Typical repair cost £180-350 (including labour)

Engineer required

This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

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Vokera models that show the 09 fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Vokera 09 fault code information on this page is sourced and cross-checked against the official Vokera service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026